No period, negative pregnancy test

Tahara
I Have not had my period since March 20th!!! I have taken home pregnancy tests, went to the dr. Had urine and blood test, both negative. I even did a thyroid test, normal! I'm usually regular and this is pretty ab normal. I was told to take another test I'm 2-3 more weeks if still no period. Still no period! 😬 thoughts!?